Mechanical tracing-pen



(No Model.) 3 Sheets-Sheet 1.

E. H. ORAIGE. MECHANICAL TRAGING PEN.

No. 426,987. I Patented Apr. 29. 1890.

WITNESSES.- llvmvrbfi Edward]? Kra'af'a. 661mm W By 7 a i a Y/H in), ATTORNEYS (No Model.) 3 Sheets-Sheet 2.

E. H. GRAIGE. MECHANICAL TRAGING PEN.

N0.j% ,987. c Patenglp 9, 1890.

s d cl WITNESSES: llVl/EIVTOI? BY Y ' Av ATTORNEYS v (No Model.) 3 Sheets-Sheet 3. E. H. GRAIGE. MECHANICAL TRAOING PEN. No. 426,987. 1 Patented Apr. 29, 1890.

I J llllll ll WITNESSES: INVEN'TOH:

- .EdwardJi Craz 'ye. (5 m BY W VW 4% $79 ATTORNEYS UNITED States PATENT @rrrcs.

EDWVARD H. CRAIGE, OF BROOKLYN, NEW YORK.

MECHANICAL -TRACING-PEN.

SPECIFICATION forming part of Letters Patent No. 426,987, dated April 29, 1890.

Application filed June 13, 1889. Serial No. 314,092. (No model.)

To all whom it may concern.-

Be it known that I, EDWARD II. CRAIGE, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented new and useful Improvements in Mechanical Tlracing-Pens, of which the following is a specification.

This invention relates to a novel construction of the mechanism employed for imparting and controlling the motion of a mechanical tracing-pen or other tool, as pointed out in the following specification and claims and illustrated in the accompanying drawings, in which- Figure 1 represents a side view. Fig. 2 is a plan or top view. Fig. 2* is a vertical sec tion on the plane cc as, Fig. 2, on a larger scale than the previous figures. Fig. 3 is a side view of a portion of the driving-gear. Fig. 4 is a vertical section in the plane 00 00, Fig. 3. Fig. 5 is a plan or top view showing a modification of the driving-gear. Fig. 0 is a horizontal section on the plane y y, Fig. 5.

' Fig. '7 is a plan or top view of another n1odification of the driving-gear. Fig. Sis ahorizontal section in the plane z z, Fig. 7. Fig. 9 is a side View similar to that shown in Fig. 3,1'epresenting the parts in a different position. Fig. :10 is a plan or top View of the same.

Similar letters indicate corresponding parts.

In the drawings, the letter A designates a standard, which is so constructed that it can be securely fastened in the desired position. In the example shown in the drawings said standard is provided with a clamping-screw a, by means of which it can be secured to a table B-such, for instance, as a sewing-machine table. In this standard is mounted a swivel-support O, which swings in a horizon, tal plane on pivots b 11, secured in arms 0 0?, which project from the standard. (Best seen in Fig. 1.) In the swivel-support O is mounted a rod D, which is guided in eyes 0 0 one of which passes through the body of the support 0, while the other is formed in the end of an arm c, whichextends from the swivel-support 0.

In the example shown in Figs. 1 to i, inclusive, the rod D is provided with a collard, from which extends a tappet 61 which is held in position by a screw (1 passing through a slot (l and tapped into the arm 0, so that the collar (Z is free to move back and forth with the rod D within the limits of the slot d. Between the eye 0 of the arm 0 and the collar (Z is placed a spiral spring d, which has a tendency to force said rod in the direction of the arrow marked thereon in Fig. 3. In the rod D is firmly secured a pin 6, (best seen in Fig. 4,) which forms the bearing for a friction-wheel E, and to this friction-wheel is firmly connected a grooved pulley 6'. standard A is secured in such a position that the spring (1 presses the friction-wheel E up against the rim of a fly-wheel F, which may be the fiy-wheel of a sewing-machine, so that when motion isimparted to this fiy-wheel the friction-wheel E and the pulley c are caused to revolve with great velocity. The face of the frictional wheel is convex, and it may be made tapering, as shown in Fig. 4, so that it can readily adapt itself to the rim of the flywheel F when the swivel-support C is swung around in a horizontal plane on its pivots Z) b.

On the rod D'is loosely mounted a head G, which carries an arbor g, on which are loosely mounted two pulleys g g which are firmly connected together, so that they are compelled to move together. The arbor g is firmly secured in the head H, and it is provided with a head g which prevents it from slipping through the head G. (Best seen in Fig. On the rod D is secured a collar (Z and between this collar and a shoulder g of the head G is placed a spring g which has a tendency to push said head out in the direction of the arrow marked thereon in Fig. 2. From the pulley e of the friction-wheel E extends a belt 6 round the pulley g on the arbor g, and the spring g serves to preserve the ten sion of this belt.

In the head His firmly secured a rod h, which extends into the tubular rod h, Fig. 2*, and on which is placed a spiral spring 7L2, which has a tendency to press the tubular rod h outward in the direction of the arrow marked thereon in Figs. 1 and 2.

On the tubular rod h is firmly secured a projection 7L3, which engages a slot h in the head II and forms a stop to limit the outward mot-ion of the rod h, Fig. 2*. To the outer end of this rod is firmly secured the casing I, which carries the tracing-pen J or another The Y tool, and through which extends a shaft i, from which the required motion is transmitted to the tracing-pen by an ysuitable connection. On the shaft is mounted a pulley 21, from which extends a belt 5 round the pulley The sprin 7L2 serves to preserve the tension of the belt It will be noticed from the above description that the rod or arm 72., which carries the tracing-pen, can be freely swung round the arbor gwithoutdisturbing the operation of the belt 1' but it is desirable that the swiveling movement of the support C shall be limited, since if said support should be swung round beyond a certain limit the frictionwheel E would be liable to lose its grip on the flywheel F. I have therefore connected with the standard A a stop K, which swings on a pivot k and when lowered rests between the tappet (F and a lip in, formed on the swivelsupport C, Figs. 1, 2, and 3, so that the tappet limits the motion of the support in one and the lip 71: in the opposite direction.

If it is desired to throw the friction-wheel E out of gear with the fly-wheel F, the tappet (Z is forced back to the position shown in Figs. 9 and 10 and the shoulder 7c of the stop K is brought to engage a notch Win the horizontal portion of the tappet (P, Fig. 10. \Vhen the stop K is thrown up, so as to release the notch (1, the spring (Z throws the frictionwheel in contact with the fly-wheel F.

In the example shown in Figs. 5 and 6 the friction-wheel E, instead of being pressed up against the rim of a fly-wheel F, is held in contaet with a moving belt or rope F and in order to preserve the contact said belt is sub jected to the action of spring-pressed rollers f* f*.

In the example shown in Figs. 7 and 8 the moving belt or rope F is held in contact with the friction-wheel E by a single spring'pressed roller f.

\Vhat I claim as new, and desire to secure by Letters Patent, is-

1. The combination, with the standard. A, of the swivel-support G, swiugin in a horizontal plane on independent pivots, the rod 1.), carried by said support, the friction-wheel E, the pulley e, attached to this wheel, the head G, carried by the rod 1), the arbor g, the head 11, the pulleys g mounted on this arbor, the rod h 71 carried by the head II, the casing I carried by the rod 71 It, the pulley 2", carried by the casing I, and the belts c 11 substantially as shown and described.

2. The combination, with the standard A, of the swivel-support C, the rod D, carried by said support, the spring (If, made to act on said rod, the convex friction-wheel E, and the stop K, substantially as shown and described.

3. The combination, with the standard A, of the swivel-support swinging in a horizontal plane 011 independent pivots, the rod 1), carried by said support, the friction-wheel E, the pulley e, secured to the friction-wheel, the head G, mounted loosely on the red I) and subjected to the action of the spring the arbor g, the head II, the pulleys y mounted on this arbor, the rod h, firmly secured in the head II, the tubular red It, the casing I, carried by the rod the pulley i, carried by the casing I, and the belts 6 2' substantially as described.

t. The combination, with the standard A, of the swivehsupport G, the rod D, the spring (1 the convex friction-wheel E, and the flywheel F, substantially as described.

5. The combination, with the standard A, of. the swivel-support C, the rod D, the spring (1,

the convex frictionavheel E, the movable tap- 7 pet (F, the stop K, and the fly-wheel F, substantially as described.

In testimony whereof I have hereunto set my hand and seal in the presence of two subscribing witnesses.

E'DlVARD ll. CRAIGE.

.YltilOSSGS:

J. VAN SANtrvooRi),

Enxstr F. KAs'rENHUBER. 

